Digestivekǒuchòu

Bad Breath (Halitosis)

Also called:Bad breathHalitosisMouth odor

From the TCM perspective: TCM 'kou chou'; located in spleen-stomach, involving mouth/teeth and lung.

Overview

Bad breath is an unpleasant odor from the mouth. TCM treats it mainly through accumulated heat in the spleen-stomach and intestines, with patterns of exuberant stomach fire, food stagnation, spleen-stomach damp-heat and yin deficiency with stomach heat; oral and throat causes should first be excluded.

☯Common patterns (syndrome differentiation)

Exuberant stomach fire

Key distinguishing signs: Bad breath with dry mouth preferring cold drinks, swollen/bleeding gums, red face, constipation, dark urine, red tongue with yellow coat, slippery rapid pulse.
Treatment principle: Clear the stomach and drain fire

Food stagnation

Key distinguishing signs: Sour-rotten breath, abdominal fullness, sour belching, poor appetite, foul stool, thick greasy coat, slippery pulse.
Treatment principle: Disperse food and harmonize the stomach

Spleen-stomach damp-heat

Key distinguishing signs: Turbid malodorous breath, sticky bitter taste, stomach oppression, poor appetite, heavy body, sticky stool, red tongue with yellow greasy coat, soggy rapid pulse.
Treatment principle: Clear heat, drain dampness and transform turbidity

Yin deficiency with stomach heat

Key distinguishing signs: Bad breath with dry mouth/throat, hunger without desire to eat, mildly inflamed gums or recurrent ulcers, red tongue with little coat, fine rapid pulse.
Treatment principle: Nourish yin and clear heat

Daily self-care

Brush twice daily and floss, clean the tongue, and have regular dental care for cavities and gum disease.
Rinse after meals, hydrate, stop smoking and limit alcohol; reduce garlic/onion and other irritants; with stomach heat/food stagnation eat lightly and avoid bingeing.
Marked dry mouth or sinus disease, tonsil stones or reflux warrants cause-specific evaluation.

When to seek medical help

The following warning signs require prompt medical evaluation — do not rely on self-treatment:

Fruity/acetone breath with thirst, frequent urination or altered consciousness: emergency (diabetic ketoacidosis).
Bad breath with fever, gum/facial swelling or difficulty swallowing/breathing: prompt care.
Vomiting blood, black stool or persistent upper abdominal pain: seek evaluation.

Medical disclaimer: Educational content about traditional Chinese medicine for information only; it is not a diagnosis or treatment and does not replace a qualified clinician. If symptoms worsen or warning signs appear, seek medical care.

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